Improvement in engine-frames for tramway-cars



W.D.SCOTT. MONCRIEFF.

ENGINE-FRAME FOR TRAMWAY-CARS.

No.180,906, Patented Aug.8, 1876.

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UNITED STATES PATENT OFFICE.

WILLIAM D. SOOTT-MONORIEFF, OF GLASGOW, SCOTLAND.

IMPROVEMENT IN ENGINE-FRAMES FOR TRAMWAY-CARS.

Specification forming part of Letters Patent No. 180,906, dated August8, 1876; application filed April 28, 1876.

To all whom it may concern:

Be it known that I, WILLIAM DUNDAS SOOTT-MONGRIEFF, of Glasgow, in thecounty of Lanark, Scotland, have invented an'Improved PneumaticTramway-Gar, of which the following is a specification:

The object of my invention is to construct the frame, cylinders, andengine details of. a pneumatic street-car in an economical manner; andthis object I attain in the manner hereafter described; reference beingbad to the accompanying drawing, in which- Figure l is a side view ofthe lower part of the car, and Fig. 2 a plan view with thepassenger-compartment removed.

In the present instance six horizontal cylinders', 20, receive thecompressed airfor operating the engine, these cylinders occupyingpositions beneath the body of the car, but in two separate sets, with aspace between them.

The lower part of the body of the car is formed of a rectangularframe-work, consisting of two strong longitudinal girders or verticalside plates, extending from end to end, and suitably strengthened byangle and bar iron, and theselongitudinal side plates are connected byan gle-iron to four transverse vertical plates, two of which form theends, while the other two divide the internal space into threecompartments. Three of the air-cylinders 20 are arranged longitudinallyin each end compartment, and each cylinder is, by preference, made of asingle plate of steel or malleable iron, and having the longitudinaljoint welded, while the ends consist of flanged disks 29,'riveted orwelded to the cylinders. The cylinders 20 are provided with longitudinalcentral stays, which are also used for fixing the cylinders in the endcompartments of the framing, these stays being made to project beyondthe screw-nuts which bear against the end disks 29, and to pass throughopenings in the transverse frame-plates, on the outside of whichadditional holding-nuts are screwed onto them. To the framework, in thespace intermediate between the air-cylinders, is secured a rectangularframe, 31, which can be detached when necessary, and in hearings in thisframe turn the axles 25 and 28 of the wheels 21, 22, 23, and 24 of thecar. The axle 25 is cranked, as shown, and is operated by suitabledriving-shafts from the pair of cylin' ders 26 and 27, which aresupplied with air from the cylinders 20. The heads of these cylinders 26and 27 are bolted to the detachable frame 31, this being preferablytheir only means of connection.

It will thus be seen that the engine, wheels, and air-cylinders areeconomically and compactly arranged; and the engine itself may bereadily detached for repairs, or the framework 31, with the wheels andengine, if necessary, quickly removed and replaced.

I claim as my invention- The combination of the frame-work of the carwith the detachable frame 31, carrying the wheels and the engine, thelatter being bolted to one end of said frame, as set forth.

In testimony whereofI have signed my name to this specification in thepresence of two subscribing witnesses.

W. D. SCOTT-MONGRIEFF.

Witnesses:

EDMUND HUNT, J OHN J ENKINS.

